杨树优良无性系
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Excellent clones of poplar
以上为机器翻译结果，长、整句建议使用 人工翻译 。
同时具有适应范围广、抗病虫强的特性，是大连地区杨树造林优良无性系。
At the same time they had strong adaptability in wide area, and characteristics of anti-disease and pest and were outstanding clones of poplar in Dalian area.
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